Needle Trajectory
Needle Trajectory - Related Videos
16:14
Trajectory Data Analyses for Pedestrian Space-time Activity Study
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Cited by 15 •
2013
A suite of spatiotemporal processing methods are presented to analyze human trajectory data, such as that collected using a GPS device, for the purpose of modeling pedestrian space-time activities.
01:26
Orthogonal Trajectories
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2026
Orthogonal trajectories describe the geometric relationship between two families of curves that intersect each other at right angles. One illustrative case involves a family of parabolas that open sideways along the x-axis. These curves share a common shape but differ by a scaling parameter, resulting in a set of curves that all pass through the origin and widen at different rates.Determining Orthogonal TrajectoriesTo identify the orthogonal trajectories for these parabolas, the first step...
04:24
Studying Cell Rolling Trajectories on Asymmetric Receptor Patterns
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Cited by 3 •
2011
We describe a protocol to observe and analyze cell rolling trajectories on asymmetric receptor-patterned substrates. The resulting data are useful for engineering of receptor-patterned substrates for label-free cell separation and analysis.
09:51
Intraosseous Needle Placement
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2023
Source: Julianna Jung, MD, FACEP, Associate Professor of Emergency Medicine, The Johns Hopkins University School of Medicine, Maryland, USA For unstable patients requiring urgent administration of medications, fluids, or blood products, establishing vascular access quickly is essential. However, there are many factors that can complicate placement of a peripheral intravenous cannula (PIV), and it is extremely common for PIV attempts to fail. PIV placement may be technically challenging in small...
10:04
Electroporation of the Hindbrain to Trace Axonal Trajectories and Synaptic Targets in the Chick Embryo
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Cited by 9 •
2013
How neuronal networks are established in the embryonic brain is a fundamental question in developmental neurobiology. Here we combined an electroporation technique with novel genetic tools, such as Cre/Lox–plasmids and PiggyBac-mediated DNA transposition system in the avian hindbrain to label dorsal interneurons and track their axonal projections and synaptic targets at various developmental stages.
FAQs
The main planning variables determine whether the needle approaches the intended biological target along a controlled path. Tissue geometry and anatomical landmarks guide their selection, while the operator also considers structures that should be avoided. Coordinating these factors helps maintain accurate access rather than treating advancement as a simple linear movement.
Geometry describes how the target and surrounding tissue are arranged in three-dimensional space, whereas landmarks help orient the planned path within that arrangement. Using both references allows the operator to choose a direction and entry location that fit the anatomy. This matters because a geometrically plausible path may still approach structures that should be avoided if landmarks are ignored.
Planning standardizes how the needle reaches a target across repeated procedures. When entry point, angle, depth, and direction are selected deliberately, operators can reduce variation in target access and limit unintended tissue disruption. This consistency supports more comparable experimental outcomes, especially when needle-based procedures are used for tissue sampling or injections.
An operator first identifies the biological target and examines the surrounding tissue geometry and anatomical landmarks. The entry point, angle, depth, and direction are then selected to create a controlled route while accounting for structures that should be avoided. During advancement, maintaining that planned route supports accurate access and helps limit unnecessary tissue disruption.
Trajectory planning is particularly relevant to tissue sampling, injections, microinjection, and image-guided interventions. In each case, planning helps align the needle with the intended target and supports controlled access. The specific value differs by procedure: sampling depends on reaching the desired tissue, whereas injection-based methods depend on placing material at the intended location with consistent targeting.
In biological techniques, precise path planning links anatomical understanding with procedural control. It can improve the consistency of research methods and support safer translation of needle-based approaches into biomedical research and clinical practice. Image-guided interventions provide one context in which this connection is especially relevant, because planned access must remain aligned with the target and surrounding structures.